Pulley.



C. A. BRINLEY.

PULLBY. APPVLIOATION FILED 111111.23, 1911.

A 1,016,668'. Patented Feb, 6,1912.

UMTZeSr-zl'izley @Hmm/p UNTTED sTATEs PATENT oEEicE.

CHARLES A. BRINLEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO IHE AMERI- CAN PULLEY COMPANY, PENNSYLVANIA.

0F PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0F PULLEY.

Specification of Letters Patent.

Patented Feb. 6, 1912.

Application led March 23, 1911. Serial No. 616,343.

To all whom t may concern Be it known that I, CHARLES A. BRTNLEY, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have 1nvented certain new and useful Improvements in Pulleys, whereof the following is a specification, reference being had to the accompanying drawings.

My invention has peculiar value in that class of pulleys which are built up from elements of pressed metal, such as steel, and in the accompanying drawings, I have shown it as embodied in a struct-ure of that character, and in the particular form known as a split pulley, that is to say, one in which the pulley is divided diametrically into two halves which are secured together at the ren gion of the hub and of the rim. It is obviously, however, not limited to such modification.

Referring to the drawings, Figure I, represents a side elevation of such pulley. Fig. II, is a partial transverse section thereof, on the line II, II, of Fig. I, and on an enlarged scale.

Referring to Fig. I, each half of the rim.

1, of the pulley is composed of two similar bands of'metal 2, and 3, respectively, whose external edges may be bent into beads such as 4, and 5, and whose meeting edges are provided with flanges 6, and 7 respectively, projecting radially inward, and ai'ording means of attachment to the spokes 10, 11, 12, etc. In certain respects said spokes are similar to one another in construction, but the intermediate spoke 10, differs slightly from the spokes 11, and 12, at its inner extremity, as will be hereinafter explained'.

In so far as the spokes are similar, their construction may be described as follows The spoke 10, comprises a pair of elongated plates or spoke-pieces 13, and 14, which are counterparts of one another, but face in opposte directions with relation to the median plane of the pulley. At their outer extremities, these spoke-pieces converge so as to closely embrace the flanges 6, and 7 of the rim, to which they are secured by means of rivets 15. From the inner'edges of the flanges 6, and 7, the general planes of the spoke-pieces diverge as they extend inwardly, as indicated by the dotted lines 16, and 17 respectively. The inner edges of the spoke-pieces 13, and 14, upon the intermediate spoke 10, are widened at each side, so as to overlap the adjacent inner edges of the spokes 11, and 12. The spoke pieces are provided with longitudinal corrugations 18, which extend throughout a considerable portion of their length, but as they approach the widened inner extremities, are bifurcated, as shown at 19, and 20, the bifurcations being prolonged well into thev wider portion. A longitudinal corrugation 21, is formed between the bifurcated corrugations 19, and 20, and extends in substantial alinement with the main longitudinal corrugation 18, but is preferably somewhat smaller in cross section. Said intermediate corrugation 21, extends radially inward somewhat farther than do the bifurcated corrugations 19, and 20. i

The spokes 11, and 12, which lie on each side of the spoke 10, are similar in construction thereto, except that the widened inner' extremities of the spoke pieces at the regions 23, and 24, respectively, are partly cut away so that the edges lie in substantial alinement with the line of diametrical division of the pulley.

The hub member is divided into two similar parts,- each of which may be considered as a complete element. Each of said members comprises a semi-cylindrical hub shell 25, upon which are mounted two semi-annular hub ring portions 26, and 27, respectively, which face in opposite directions thereon. Although each of these portions comprises only one-half of the entire circumference of the hub element, it is convenient for purposes of nomenclature, to term them hub-rings.

Each of the hub-rings comprises a semiannular band 28, which fits snugly upon the external surface of the hub shell 25, and an approximately radial flange 29, which projects outward in parallelism with the general planes of the adjacent spoke pieces. At intervals which register with the inner ends of the prolonged corrugations (corresponding with the corrugation 21, of the spoke 10), the hub-ring flange is provided with outwardly projecting pockets 30, which receive the inner extremities of the several prolonged intermediate corrugations, such as 21.

' .widening of the inner ends The inner extremities of the spoke-pieces of the-spokes ll and l2, are directly secured against the flanges of the hub-rings by means of rivets 3l, 32, 33, and 34, The inner extremities of the spoke-pieces of the intermediate spoke 10, overlap the adjacent edges of the spokes ll and l2, being arranged with respect thereto on the side remote from kthe observer in Fig. I, and are secured to the flanges of the hub-ring by means of the rivets 35, and 36, the rivet 35, being therefore common to the spoke-pieces 10 and 1l, and the rivet 36, being therefore common to the spoke-pieces l0 and 12.

Clamping bands 37, adapted to receive the bolts 38, which secure the two halves of the hub together, embrace the flanges of the respective hub-rings and are secured thereto by means of rivets 39. I

@The organization thus described possesses great 'structural strength, while at the same time permitting the use of a relatively shallow flange upon the hub-ring, since the of the spoke pieces and the prolongation of the bifurcated corrugations and central corrugations thereof, gives great stability to the parts.

'I am aware that itis not broadly new to construct spoke-pieces with overlapping inner ends, and I, therefore, do not broadly claim the same.

Copies of Ythis patent may be obtained for ve cents each, by `achesgsing' the 4(Jox'mnisslioner of Patents.

lsigned my nalne at Philadelphia,

Having thus described my invention, I claim:

In a pulley, the combination with a rim; of a plurality of spokes, each comprising a pair of spoke-pieces converging at their outer extremities to a point of attachment to the rim and being extended laterally at their inner extremities; each of said spokepieces being provided with a longitudinal corrugation, bifurcated at the region of lateral extension of the spoke-piece, and with an intermediate longitudinal corrugation prolonged beyond the bifurcations; the inner extremities of said spoke-pieces overlapping the inner ends of the adjacent spoke-pieces; a hub-shell; hub-rings respectively comprising a'band portion adapted for attachment to the hub-shell, and a flange provided with radial pockets adapted to receive the inner ends of the prolonged corrugat-ions of the spoke-pieces; and means for securing the spoke-pieces to the hubrings and to the rim respectively.

In testimony whereof, I have hereunto Pennsylvania, this twenty-second day of March,

CHARLES A. BRINLEY. vWitnesses l JAMES H. BELL, E. L. FULLERTON.

Washington, D. C. 

